Media.io - Media.io has all the handy tools you need for video & audio converting (.mp4, .mp3, .mov, .mkv, .avi, .wav, etc.) and editing, like generating auto subtitles, applying engaging text, music, effects, templates.
PocketTube - Group YouTube subscriptions into YouTube folder. Video Deck for Youtube. Mark as watched videos. Filter YouTube video. Youtube mode
Universal Word - Translate YouTube subtitles into multiple languages
Video Deck for YouTube - Control videos that are uploaded by your favourite YouTube channels.
Subtitle Generator - Subtitle Generator will automatically create subtitles for your YouTube videos and translate them into other languages.
Infstream - Infstream is a YouTube alternative with no adverts & no demonetization. Channels earn by charging $1 per month for access to their videos.